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   <h1>H1标题</h1>
   <h2>h2_title</h2>
   <h3>h3_title</h3>
   <h4>h4_title</h4>
   <h5>h5_title</h5>
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   <p>Hell_Geek_Academy</p>
   <p>Hello</p>

   <a href="http://www.jikexueyuan.com" target="_blank">Study_home</a>

   <img src="images/html" alt="">

   <p>This is my first page</p>
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   <b>Welcome to Geek Academy</b>
   <br>
   <big>Welcome to Geek Academy</big>
   <br/>
   <em>Welcome to Geek Academy</em>
   <br>
   <i>Welcome to Geek Academy</i>
   <br>
   <small>Welcome to Geek Academy</small>
   <br>
   <strong>Welcome to Geek Academy</strong>
   <br>
   <sub>Welcome</sub> to Geek Academy
   <br>
   <sup>Welcome</sub>to Geek Academy
   <br>
   <ins datetime="2015-01-14T23:30:07 +0800">Welcome to Geek Academy</ins>
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   <del datetime="2015-01-14T23:30:07 +0800">Welcome to Geek Academy</del>
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